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The triple eccentric systems V974 Cyg, RU Mon, and V456 Oph
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SYSNO ASEP 0510345 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The triple eccentric systems V974 Cyg, RU Mon, and V456 Oph Author(s) Wolf, M. (CZ)
Zasche, P. (CZ)
Kučáková, H. (CZ)
Hoňková, K. (CZ)
Juryšek, Jakub (FZU-D) ORCID
Mašek, Martin (FZU-D) ORCID
Uhlař, R. (CZ)
Urbanik, M. (SK)Number of authors 8 Source Title Acta Astronomica. - : Copernicus Foundation for Polish Astronomy - ISSN 0001-5237
Roč. 67, č. 3 (2017), s. 257-271Number of pages 15 s. Language eng - English Country PL - Poland Keywords eclipsing binaries ; individual stars V974 Cyg, RU Mon, V456 Oph ; stars: fundamental parameters Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) R&D Projects LM2015038 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LG15014 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001402 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000417556300004 EID SCOPUS 85035337331 DOI 10.32023/0001-5237/67.3.4 Annotation We present results of a long-term program for timing the eclipses of eccentric eclipsing binaries. About 40 new precise mid-eclipse times were measured for the eclipsing binary V974 Cyg, RU Mon and V456 Oph. Based on current O-C diagrams, we found in all cases that times of minima besides the typical apsidal motion show additional cyclical changes caused very probably by the third bodies orbiting the eclipsing pair. The periods of apsidal motion are 1470 yr, 361 yr and 22.6 yr, respectively. The period of V456 Oph this is one of the shortest known apsidal-motion periods. The relativistic contributions to the total apsidal-motion rate are significant for V974 Cyg (about 30%) and negligible for RU Mon and V456 Oph (1-2.5%). The third-body orbital periods are relatively short: 30.6 yr, 59.8 yr and 7.4 yr, and their minimal masses are 0.40 M-circle dot, 1.6 M-circle dot, and 0.27 M-circle dot, respectively. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020 Electronic address https://doi.org/10.32023/0001-5237/67.3.4
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